Period stop then start? TMI

Alyn • 27 married 1 year together 9 1/2. TTC almost 5 years.😔 husband has low count and low T.
Stopped last night haven't wore anything all day just had unprotected sex with my boyfriend and I Started bleeding pretty decently (down my leg) resulted in a shower obviously none on him but this has never happened before. HELP?!?